Product details
Weiss Industrial Thermowell | ESS35-75BS | 7.5″ Length | Brass
Product Description
The ESS35-75BS is a precision-machined protective housing that allows thermometers to be removed or replaced without the need to drain or depressurize the piping system. The “ESS” designation identifies this as a Stepped Stem design in Brass. The stepped profile (reducing the diameter at the sensing tip) is engineered to minimize thermal mass, ensuring a significantly faster temperature response compared to straight-shank models.
The “35” indicates a 3/4″ NPT process connection, while the “75” denotes an overall length of 7.5 inches (190 mm). In Dubai and Abu Dhabi mechanical rooms, this 7.5-inch length is specifically used to accommodate 6-inch (150 mm) stem thermometers. It provides the necessary extension to clear standard pipe insulation (lagging) while ensuring the sensing tip is deeply immersed in the fluid stream for maximum accuracy.
Key Features
- High Thermal Conductivity: The brass construction allows for rapid heat transfer from the fluid to the thermometer sensor, providing real-time data for HVAC control systems.
- Stepped Stem Design: Reduces thermal lag by decreasing the amount of metal around the thermometer bulb at the sensing point.
- 5″ Total Length: Ideal for 6-inch stem thermometers, providing a 1.5-inch extension to accommodate thermal insulation layers.
- Standard 3/4″ NPT Connection: The industrial standard mounting size, ensuring compatibility with most pipe tees and fittings in UAE infrastructure projects.
- Vibration and Pressure Protection: Shields the thermometer from mechanical damage caused by high-velocity flow while providing a leak-proof system seal.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | ESS35-75BS |
| Overall Length | 7.5″ (190 mm) |
| Insertion Length (U) | 6″ (150 mm) |
| Material | Brass |
| Stem Design | Stepped Shank |
| Process Connection | 3/4″ NPT |
| Internal Thread | 1-1/4″ – 18 UNEF (Industrial Standard) |
| Application | Chilled Water / Hot Water / HVAC |
Frequently Asked Questions
- Q: Why choose Brass (BS) instead of Stainless Steel (SS)?
- A: Brass is more cost-effective and offers better heat conductivity. It is excellent for non-corrosive freshwater and chilled water systems. Stainless steel is only necessary if the fluid is corrosive or if the pressure/temperature is extremely high.
- Q: Which thermometer fits this thermowell?
- A: It is designed to house any standard industrial glass or bimetal thermometer with a 6-inch stem, such as the Weiss A9VU6 or 9VBM6 series.
- Q: Can this be used for domestic (potable) water?
- A: For drinking water systems in the UAE, you should check if the project requires the Lead-Free (LF) version (model ESS35-75BSLF) to comply with health regulations.